Free a bound ally.

Complete Chapter 1.

Stagger an enemy.

The player has completed the game without harvesting any Little Sisters

The player has become a Big Daddy

Fully upgrade four weapons

The player has fully upgraded three weapons

The player has fully upgraded two weapons

The player has purchased every slot in one of the Plasmid or Tonic tracks

The player has restored the forests of Arcadia

The player has successfully invented at least one item

The player has defeated Peach Wilkins

The player has taken at least one Research Photo of a Splicer